ENTRY 20920 20180718 22702092000000001 SUBENT 20920001 20180718 22702092000100001 BIB 15 62 2092000100002 INSTITUTE (2GERHAM) Institut fur Experimental Physik. 2092000100003 REFERENCE (J,ZP,197,124,1966) 2092000100004 AUTHOR (W.Scobel,R.W.Fink,M.Bormann) 2092000100005 TITLE The reactions N-14(n,alpha)B-11 and N-14(n,t)C-12 2092000100006 observed with a gridded ionization chamber 2092000100007 FACILITY (VDG,2GERHAM) Van de Graaff generator used between 2092000100008 1.1 MeV and 3.3 MeV. 2092000100009 (CCW,2GERHAM) Small 150 kV generator used to calibrate 2092000100010 flux by providing a source with very low gamma2092000100011 background. 2092000100012 INC-SOURCE (D-D) Deuterium gas target. Neutrons produced with 2092000100013 energies between 4.0 MeV and 6.4 MeV at 0 deg. 2092000100014 SAMPLE .Ionization chamber gas also used as sample. 2092000100015 METHOD .Direct detection of emitted alphas. 2092000100016 DETECTOR (IOCH) Gridded ionization chamber filled with argon- 2092000100017 nitrogen mixture placed at 0 degrees to the 2092000100018 deuteron beam 50 cm from the gas cell. 2092000100019 (LONGC) Long counter positioned 4.6 m behind the gas 2092000100020 target in the beam direction, and- 2092000100021 (SCIN) two organic scintillators were used to monitor 2092000100022 the neutron flux. 2092000100023 MONITOR (3-LI-6(N,T)2-HE-4,,SIG) 2092000100024 Flux determined as a two stage process- 2092000100025 1.The cross section for N-14(n,alpha0) was measured at2092000100026 a neutron angle corresponding to 2.48 MeV neutrons. 2092000100027 2.The same cross section was the measured on the low 2092000100028 gamma-background. Small accelerator relative to the 2092000100029 Li-6(n,t) cross section at 2.48 MeV (determined 2092000100030 with a Li-I(Eu) crystal enriched in Li-6 in the 2092000100031 target position). 2092000100032 MONIT-REF (,J.R.Stehn+,R,BNL-325,1964) - The cross section 2092000100033 of Li-6(n,alpha)H-3 at 2.48 MeV was taken as the 2092000100034 average of the values given in this ref.)p.3-6-7) 2092000100035 STATUS (NDD) Graphs given in this work, tabulated values 2092000100036 taken from Bormann(CCDN11 680326 10). 2092000100037 CORRECTION .Two main corrections- 2092000100038 1.loss of efficiency as a result of particles 2092000100039 striking the counter walls. 2092000100040 2.Neutron flux corrections, composed of- 2092000100041 attenuation of neutrons in Ionization chamber 2092000100042 before reaching the long counter. 2092000100043 Efficiency of long counter at various energies. 2092000100044 Different solid angles subtended by Ionization 2092000100045 chamber and long counter at the neutron source. 2092000100046 ERR-ANALYS (ERR-T) Total error consists of partial errors in the 2092000100047 relative measurement of- 2092000100048 (ERR-1) N-2 pressure............................ 1.0% 2092000100049 (ERR-2) long counter counting corrections (each).3.0% 2092000100050 (ERR-3) position and size of sensitive volume... 3.0% 2092000100051 (ERR-4,,5.) wall loss correction (upper limit).. 5.0% 2092000100052 (ERR-S,,1.) statistical error (upper limit)..... 1.0% 2092000100053 (MONIT-ERR) Error in the absolute measurement of 8% in 2092000100054 the Li-6(n,alpha) cross section at 2.48 MeV and in its2092000100055 measurement in this work. 2092000100056 Cross sections are threfore accurate to about- 2092000100057 15 to 20% for (n,alpha0) 2092000100058 30% for (n,alpha1) 2092000100059 30% for (n,triton0) 2092000100060 HISTORY (19790509C) 2092000100061 (20180718A) SD:Updated to new date formats,lower case. 2092000100062 Data units in Subents 002-004 corrected. MONIT added. 2092000100063 ERR-ANAlYS was updated. 2092000100064 ENDBIB 62 0 2092000100065 COMMON 6 3 2092000100066 EN-NRM MONIT MONIT-ERR ERR-1 ERR-2 ERR-3 2092000100067 MEV MB MB PER-CENT PER-CENT PER-CENT 2092000100068 2.48 188. 15. 1. 3. 3. 2092000100069 ENDCOMMON 3 0 2092000100070 ENDSUBENT 69 0 2092000199999 SUBENT 20920002 20180718 22702092000200001 BIB 4 6 2092000200002 REACTION (7-N-14(N,A)5-B-11,PAR,SIG) 2092000200003 .transition to the ground state only. 2092000200004 ERR-ANALYS (ERR-5) Uncertainty due to subtraction of background 2092000200005 STATUS (NDD) Data from Bormann(CCDN 1968/03/26 10). 2092000200006 HISTORY (20180718A) SD: Data units corrected (MB -> B). 2092000200007 E-LVL=0 was added. ERR-ANALYS added. DATA-ERR -> ERR-T.2092000200008 ENDBIB 6 0 2092000200009 COMMON 2 3 2092000200010 E-LVL ERR-5 2092000200011 MEV PER-CENT 2092000200012 0.0 5. 2092000200013 ENDCOMMON 3 0 2092000200014 DATA 4 50 2092000200015 EN EN-RSL DATA ERR-T 2092000200016 MEV MEV B B 2092000200017 2.4800E+00 4.0000E-02 8.8000E-02 1.4000E-02 2092000200018 3.9700E+00 4.0000E-02 3.4900E-01 7.0000E-02 2092000200019 4.0200E+00 4.0000E-02 3.5900E-01 7.2000E-02 2092000200020 4.0600E+00 4.0000E-02 4.1000E-01 8.2000E-02 2092000200021 4.1000E+00 4.0000E-02 4.5000E-01 9.0000E-02 2092000200022 4.1500E+00 4.0000E-02 3.9400E-01 7.9000E-02 2092000200023 4.2000E+00 4.0000E-02 3.4300E-01 6.9000E-02 2092000200024 4.2400E+00 4.0000E-02 3.2400E-01 6.5000E-02 2092000200025 4.2900E+00 4.0000E-02 3.2400E-01 6.5000E-02 2092000200026 4.3300E+00 4.0000E-02 3.1400E-01 6.3000E-02 2092000200027 4.3700E+00 4.0000E-02 3.2500E-01 6.5000E-02 2092000200028 4.4200E+00 4.0000E-02 2.8400E-01 5.7000E-02 2092000200029 4.4600E+00 4.0000E-02 3.0000E-01 6.0000E-02 2092000200030 4.5100E+00 4.0000E-02 3.0200E-01 6.0000E-02 2092000200031 4.5600E+00 4.0000E-02 3.3000E-01 6.6000E-02 2092000200032 4.6000E+00 4.0000E-02 3.3600E-01 6.7000E-02 2092000200033 4.6500E+00 4.0000E-02 3.2900E-01 6.6000E-02 2092000200034 4.7000E+00 4.0000E-02 2.2700E-01 4.5000E-02 2092000200035 4.7400E+00 4.0000E-02 1.9100E-01 3.8000E-02 2092000200036 4.7900E+00 4.0000E-02 1.7700E-01 3.5000E-02 2092000200037 4.8400E+00 4.0000E-02 1.6700E-01 3.3000E-02 2092000200038 4.8900E+00 4.0000E-02 1.6400E-01 3.3000E-02 2092000200039 4.9400E+00 4.0000E-02 1.7900E-01 3.6000E-02 2092000200040 4.9900E+00 4.0000E-02 1.8600E-01 3.7000E-02 2092000200041 5.0400E+00 5.0000E-02 1.8000E-01 3.6000E-02 2092000200042 5.0900E+00 5.0000E-02 1.5700E-01 3.1000E-02 2092000200043 5.1400E+00 5.0000E-02 1.3400E-01 2.7000E-02 2092000200044 5.1900E+00 5.0000E-02 1.0100E-01 2.0000E-02 2092000200045 5.2400E+00 5.0000E-02 7.5000E-02 1.5000E-02 2092000200046 5.2900E+00 5.0000E-02 5.4000E-02 1.1000E-02 2092000200047 5.3400E+00 5.0000E-02 4.7000E-02 1.0000E-02 2092000200048 5.3900E+00 5.0000E-02 3.5000E-02 7.0000E-03 2092000200049 5.4400E+00 5.0000E-02 2.9000E-02 6.0000E-03 2092000200050 5.4900E+00 5.0000E-02 3.0000E-02 6.0000E-03 2092000200051 5.5400E+00 5.0000E-02 4.0000E-02 8.0000E-03 2092000200052 5.6000E+00 5.0000E-02 4.7000E-02 1.0000E-02 2092000200053 5.6500E+00 5.0000E-02 3.7000E-02 8.0000E-03 2092000200054 5.7000E+00 5.0000E-02 3.5000E-02 7.0000E-03 2092000200055 5.7600E+00 5.0000E-02 4.8000E-02 1.0000E-02 2092000200056 5.8100E+00 5.0000E-02 6.1000E-02 1.2000E-02 2092000200057 5.8600E+00 5.0000E-02 6.1000E-02 1.2000E-02 2092000200058 5.9200E+00 5.0000E-02 5.5000E-02 1.1000E-02 2092000200059 5.9700E+00 5.0000E-02 5.9000E-02 1.2000E-02 2092000200060 6.0300E+00 5.0000E-02 5.1000E-02 1.0000E-02 2092000200061 6.0800E+00 5.0000E-02 4.9000E-02 1.0000E-02 2092000200062 6.1400E+00 5.0000E-02 6.5000E-02 1.3000E-02 2092000200063 6.1900E+00 5.0000E-02 5.7000E-02 1.1000E-02 2092000200064 6.2500E+00 5.0000E-02 6.8000E-02 1.4000E-02 2092000200065 6.3100E+00 5.0000E-02 5.3000E-02 1.1000E-02 2092000200066 6.3700E+00 5.0000E-02 4.2000E-02 8.0000E-03 2092000200067 ENDDATA 52 0 2092000200068 ENDSUBENT 67 0 2092000299999 SUBENT 20920003 20180718 22702092000300001 BIB 4 7 2092000300002 REACTION (7-N-14(N,A)5-B-11,PAR,SIG) 2092000300003 .transition to first excited state only. 2092000300004 STATUS (NDD) Data from Bormann(CCDN 1968/03/26 10). 2092000300005 ERR-ANALYS (ERR-5,20.,25.) Uncertainty due to subtraction of 2092000300006 background 2092000300007 HISTORY (20180718A) SD: Data units corrected (MB -> B). 2092000300008 LVL-NUMB=1 was added. ERR-ANALYS added. DATA-ERR->ERR-T2092000300009 ENDBIB 7 0 2092000300010 COMMON 1 3 2092000300011 LVL-NUMB 2092000300012 NO-DIM 2092000300013 1. 2092000300014 ENDCOMMON 3 0 2092000300015 DATA 4 42 2092000300016 EN EN-RSL DATA ERR-T 2092000300017 MEV MEV B B 2092000300018 4.2900E+00 4.0000E-02 1.8500E-02 5.6000E-03 2092000300019 4.3300E+00 4.0000E-02 2.3900E-02 7.2000E-03 2092000300020 4.3700E+00 4.0000E-02 2.8000E-02 8.4000E-03 2092000300021 4.4200E+00 4.0000E-02 2.7700E-02 8.3000E-03 2092000300022 4.4600E+00 4.0000E-02 2.7200E-02 8.2000E-03 2092000300023 4.5100E+00 4.0000E-02 3.2900E-02 9.9000E-03 2092000300024 4.5600E+00 4.0000E-02 3.4500E-02 1.0300E-02 2092000300025 4.6000E+00 4.0000E-02 2.8800E-02 8.6000E-03 2092000300026 4.6500E+00 4.0000E-02 3.1900E-02 9.6000E-03 2092000300027 4.7000E+00 4.0000E-02 2.8600E-02 8.6000E-03 2092000300028 4.7400E+00 4.0000E-02 3.0100E-02 9.0000E-03 2092000300029 4.7900E+00 4.0000E-02 3.2900E-02 9.9000E-03 2092000300030 4.8400E+00 4.0000E-02 3.4400E-02 1.0300E-02 2092000300031 4.8900E+00 4.0000E-02 3.2800E-02 9.8000E-03 2092000300032 4.9400E+00 4.0000E-02 4.0000E-02 1.2000E-02 2092000300033 4.9900E+00 4.0000E-02 4.5100E-02 1.3500E-02 2092000300034 5.0400E+00 5.0000E-02 4.4900E-02 1.3500E-02 2092000300035 5.0900E+00 5.0000E-02 3.8000E-02 1.1500E-02 2092000300036 5.1400E+00 5.0000E-02 3.3800E-02 1.0200E-02 2092000300037 5.1900E+00 5.0000E-02 3.2000E-02 9.6000E-03 2092000300038 5.2400E+00 5.0000E-02 3.2200E-02 9.7000E-03 2092000300039 5.2900E+00 5.0000E-02 3.3600E-02 1.0200E-02 2092000300040 5.3400E+00 5.0000E-02 3.0200E-02 9.1000E-03 2092000300041 5.3900E+00 5.0000E-02 3.2400E-02 9.7000E-03 2092000300042 5.4400E+00 5.0000E-02 3.0800E-02 9.2000E-03 2092000300043 5.4900E+00 5.0000E-02 2.9400E-02 8.8000E-03 2092000300044 5.5400E+00 5.0000E-02 2.9100E-02 8.7000E-03 2092000300045 5.6000E+00 5.0000E-02 2.8900E-02 8.7000E-03 2092000300046 5.6500E+00 5.0000E-02 3.1300E-02 9.4000E-03 2092000300047 5.7000E+00 5.0000E-02 2.8400E-02 8.5000E-03 2092000300048 5.7600E+00 5.0000E-02 3.2800E-02 9.8000E-03 2092000300049 5.8100E+00 5.0000E-02 3.3900E-02 1.0200E-02 2092000300050 5.8600E+00 5.0000E-02 3.1400E-02 9.4000E-03 2092000300051 5.9200E+00 5.0000E-02 3.2900E-02 9.9000E-03 2092000300052 5.9700E+00 5.0000E-02 4.4200E-02 1.3300E-02 2092000300053 6.0300E+00 5.0000E-02 3.1700E-02 9.5000E-03 2092000300054 6.0800E+00 5.0000E-02 3.2800E-02 9.8000E-03 2092000300055 6.1400E+00 5.0000E-02 4.5300E-02 1.3600E-02 2092000300056 6.1900E+00 5.0000E-02 5.7400E-02 1.7200E-02 2092000300057 6.2500E+00 5.0000E-02 5.9700E-02 1.7900E-02 2092000300058 6.3100E+00 5.0000E-02 3.1000E-02 9.3000E-03 2092000300059 6.3700E+00 5.0000E-02 2.9200E-02 8.8000E-03 2092000300060 ENDDATA 44 0 2092000300061 ENDSUBENT 60 0 2092000399999 SUBENT 20920004 20180718 22702092000400001 BIB 4 7 2092000400002 REACTION (7-N-14(N,T)6-C-12,PAR,SIG) 2092000400003 .transition to ground state only. 2092000400004 ERR-ANALYS (ERR-5,20.,25.) Uncertainty due to subtraction of 2092000400005 background 2092000400006 STATUS (NDD) Data from Bormann(CCDN 1968/03/26 10). 2092000400007 HISTORY (20180718A) SD: Data units corrected (MB -> B). 2092000400008 E-LVL=0 was added. ERR-ANALYS added. DATA-ERR -> ERR-T.2092000400009 ENDBIB 7 0 2092000400010 COMMON 1 3 2092000400011 E-LVL 2092000400012 MEV 2092000400013 0.0 2092000400014 ENDCOMMON 3 0 2092000400015 DATA 4 14 2092000400016 EN EN-RSL DATA ERR-T 2092000400017 MEV MEV B B 2092000400018 5.6500E+00 5.0000E-02 2.1400E-02 6.4000E-03 2092000400019 5.7000E+00 5.0000E-02 2.1200E-02 6.4000E-03 2092000400020 5.7600E+00 5.0000E-02 1.6000E-02 4.8000E-03 2092000400021 5.8100E+00 5.0000E-02 1.1600E-02 3.5000E-03 2092000400022 5.8600E+00 5.0000E-02 1.4500E-02 4.3000E-03 2092000400023 5.9200E+00 5.0000E-02 2.4900E-02 7.5000E-03 2092000400024 5.9700E+00 5.0000E-02 2.3700E-02 7.1000E-03 2092000400025 6.0300E+00 5.0000E-02 2.2800E-02 6.8000E-03 2092000400026 6.0800E+00 5.0000E-02 2.3900E-02 7.2000E-03 2092000400027 6.1400E+00 5.0000E-02 1.9400E-02 5.8000E-03 2092000400028 6.1900E+00 5.0000E-02 2.0700E-02 6.2000E-03 2092000400029 6.2500E+00 5.0000E-02 1.8200E-02 5.5000E-03 2092000400030 6.3100E+00 5.0000E-02 1.8800E-02 5.6000E-03 2092000400031 6.3700E+00 5.0000E-02 1.5100E-02 4.5000E-03 2092000400032 ENDDATA 16 0 2092000400033 ENDSUBENT 32 0 2092000499999 ENDENTRY 4 0 2092099999999